Existing studies of settler colonial genocides explicitly consider the roles of metropolitan and colonial states, and their military forces in the perpetration of exterminatory violence in settler colonial situations, yet rarely pay specific attention to the dynamics around civilian-driven mass violence against indigenous peoples. In many cases, however, civilians were major, if not the main, perpetrators of such violence. The focus of this book is thus on the role of civilians as perpetrators of exterminatory violence and on those elements within settler colonial situations that promoted mass violence on their part.